node: added command to remove position from context

app/node/node.cpp

@@ -2348,4 +2348,24 @@ void NodeSetPositionToOffsetOfAnotherNodeCommand::undo()
   graph->SetNodePosition(node_, relative_, old_pos_);
 }
 
+void NodeRemovePositionFromContextCommand::redo()
+{
+  NodeGraph *graph = node_->parent();
+
+  contained_ = graph->ContextContainsNode(node_, context_);
+
+  if (contained_) {
+    old_pos_ = graph->GetNodePosition(node_, context_);
+    graph->RemoveNodePosition(node_, context_);
+  }
+}
+
+void NodeRemovePositionFromContextCommand::undo()
+{
+  if (contained_) {
+    NodeGraph *graph = node_->parent();
+    graph->SetNodePosition(node_, context_, old_pos_);
+  }
+}
+
 }

app/node/node.h

@@ -1445,6 +1445,35 @@ private:
 
 };
 
+class NodeRemovePositionFromContextCommand : public UndoCommand
+{
+public:
+  NodeRemovePositionFromContextCommand(Node *node, Node *context) :
+    node_(node),
+    context_(context)
+  {
+  }
+
+  virtual Project * GetRelevantProject() const override
+  {
+    return node_->project();
+  }
+
+  virtual void redo() override;
+
+  virtual void undo() override;
+
+private:
+  Node *node_;
+
+  Node *context_;
+
+  QPointF old_pos_;
+
+  bool contained_;
+
+};
+
 }
 
 #endif // NODE_H